actinal

Etymology
From. The usage was coined by Louis Agassiz (See quotations below.).

Adjective

 * 1)  Pertaining to the side or surface around the mouth in an animal that has radial symmetry such as a starfish.
 * 2)  Pertaining to the axis of rotational symmetry in radiate animals.
 * 1)  Pertaining to the axis of rotational symmetry in radiate animals.